package xscscscc;

import java.util.Locale;

public class E3 {
    public static void main(String[] args){
        String str = "abcd";
        System.out.println("将字符串转换为字符数组后的结果：");
        char[] charArray = str.toCharArray();
        for (int i = 0;i<charArray.length;i++){
            if (i !=charArray.length -1){
                System.out.println(charArray[i] +"," );
            }else {
                System.out.println(charArray[i]);
            }
        }
        System.out.println("将int值转换为String类型之后的结果："+String.valueOf(12));
        System.out.println("将字符串转换成大写字母之后的结果："+str.toUpperCase());
        System.out.println("将字符串转换成小写字母之后的结果："+str.toLowerCase());

    }
}